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TLS Online TPP Program

#Question id: 1119

Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they:

#Unit 4. Cell Communication and Cell Signaling

  1. are species specific

  2. always lead to the same cellular response

  3. amplify the original signal many times

  4. counter the harmful effects of phosphatases

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TLS Online TPP Program

#Question id: 270

#Unit 1. Molecules and their Interaction Relevant to Biology

 Which is not a difference between RNA and DNA?
TLS Online TPP Program

#Question id: 271

#Unit 1. Molecules and their Interaction Relevant to Biology

Which type of RNA carries activated amino acids to the ribosome for assembly into proteins?
TLS Online TPP Program

#Question id: 272

#Unit 1. Molecules and their Interaction Relevant to Biology

 Which is not a biological function of RNA?
TLS Online TPP Program

#Question id: 273

#Unit 1. Molecules and their Interaction Relevant to Biology

Stem-loop structures in RNA resemble the ________ form of double-helical DNA.
TLS Online TPP Program

#Question id: 274

#Unit 1. Molecules and their Interaction Relevant to Biology

Chromatin was first observed and named by ________.
TLS Online TPP Program

#Question id: 275

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the approximate diameter of a chromatin fiber?